Method of producing pit-coal or coke briquets.



UNITED I STATES Patented March 29, 1904.

PATENT OFFICE.

METHOD OF PRODUCING PIT-COAL OR COKE BFHQUETS.

SPECIFICATION forming part of Letters Patent No. 756,124, dated March29, 1904.

Application filed August 6, 1903. Serial No. 168,4A8. (No specimens.)

To all whom it may concern.-

Be it known that I, J OHANN LIEB, a subject of the King of Prussia,Emperor of Germany, residing at Cologne, in the Province of RhenishPrussia, Prussia, Germany, have invented certain new and usefulImprovements in Methods of Producing Pit-Coal or Coke Briquets; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

The object of this invention is to reduce the relative quantity of resinor other costly agglutinants used in making briquets of finelycomminutedcoal.

To this end I first thoroughly mix a quantity of fine coal of anysuitable kind With a much smaller quantity of resin or equivalentagglutinant. This mixture is next moistened with Water, forming a thickpaste of proper consistency for molding easily. The briquets are thenmolded or shaped from this mass with light pressure. They are nextremoved to a drying-room and exposed to a temperature which willvaporize the water contained in them and soften the resin or otheragglutinant, so that the escaping steam will carry particles of saidagglutinant into every part of the bri-- quet.

By reason of this thorough distribution of the agglutinant almost everyparticle of it is made to do its maximum service, and

a tenacious homogeneous briquet will in each instance be produced withthe minimum quantity of agglutinant. For convenience some solubleadhesive material may be supplied in the water to the pasty mass beforeforming the briquets. This will temporarily aid in holding the said masstogether until the heat, while vaporizing or disintegrating suchmaterial, supplies a permanent substitute by the aforesaid distributionof particles of resin, coal-tar, or the like through the action ofsteam.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, isl The process of producing briquets of fuelconsisting in mixing a small quantity of resin or equivalent agglutinantwith fine coal; then moistening the mixture with water to theconsistency of a mass suitable for molding; then shaping the briquetsand finally subjecting them to such heat as will greatly soften theresin, vaporize the water and cause the steam thus produced to carry theparticles of resin into every part of the briquet substantially as setforth.

J OHANN LIEB.

Witnesses:

W. FRHRR. v. LYNDKER, CARL W. SCHMITT.

